content/canvas/test/test_2d.clearRect.image.offscreen.html@6474c204b198
content/canvas/test/test_2d.clearRect.image.offscreen.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
5 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
6 </head>
7 <body onload="doTest()">
8 <p id="display">
9 <canvas id="c" width="1" height="1"></canvas>
10 <img id="img" src="image_green-1x1.png">
11 </p>
12 <div id="content" style="display: none">
14 </div>
15 <pre id="test">
16 <script type="application/javascript">
18 var c = document.getElementById("c");
19 var ctx = c.getContext("2d");
20 var img = document.getElementById("img");
22 SimpleTest.waitForExplicitFinish();
24 function doTest() {
25 ctx.fillStyle = "red";
26 ctx.fillRect(0, 0, 1, 1);
27 ctx.drawImage(img, -1, 0);
28 ctx.clearRect(0, 0, 1, 1);
30 var data = ctx.getImageData(0, 0, 1, 1).data;
31 is(data[0], 0, "Red channel should be 0");
32 is(data[1], 0, "Green channel should be 0");
33 is(data[2], 0, "Blue channel should be 0")
34 is(data[3], 0, "Alpha channel should be 0");
36 SimpleTest.finish();
37 }
39 </script>
40 </pre>
41 </body>
42 </html>
